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TI-2024-18448 Aliases CVE-2024-27834GHSA-4rmp-jjj9-cfm4

Pointer Authentication bypass in Apple Safari, iOS and macOS

Priority HIGH 82Exploited in the wildCWE-287Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 4 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-287.

Summary

Apple Safari before 17.5, iOS and iPadOS before 16.7.8 and before 17.5, macOS before 14.5, tvOS before 17.5 and watchOS before 10.5 are affected. Improper authentication (CWE-287) lets an attacker with arbitrary read and write capability bypass Pointer Authentication. A local attacker with low privileges and no user interaction can exploit it. CISA added it to the Known Exploited Vulnerabilities catalog on 2026-11-04 and rates its exploitation as active.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

The issue was addressed with improved checks. This issue is fixed in Safari 17.5, iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, watchOS 10.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication.

Why it matters now

Exploitation Active In CISA KEV since 2026-11-04CISA due date 2026-11-18
EPSS 0.01502 74th percentileScored 2026-11-07
Fix Partial Safari (Apple): 17.5iOS and iPadOS (Apple): 16.7.8, 17.5+3 more productsRed Hat: 4 advisoriesRed Hat: 4 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleSafaribefore 17.517.5Patch availableCNA
AppleiOS and iPadOSbefore 16.7.8; before 17.516.7.8, 17.5Patch availableCNA
ApplemacOSbefore 14.514.5Patch availableCNA
AppletvOSbefore 17.517.5Patch availableCNA
ApplewatchOSbefore 10.510.5Patch availableCNA
  • Safari VendorApple Affected before 17.5 Fixed in 17.5 Patch available CNA
  • iOS and iPadOS VendorApple Affected before 16.7.8; before 17.5 Fixed in 16.7.8, 17.5 Patch available CNA
  • macOS VendorApple Affected before 14.5 Fixed in 14.5 Patch available CNA
  • tvOS VendorApple Affected before 17.5 Fixed in 17.5 Patch available CNA
  • watchOS VendorApple Affected before 10.5 Fixed in 10.5 Patch available CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*before 17.5VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 16.7.8; 17.0 to before 17.5VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 16.7.8; 17.0 to before 17.5VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 14.5VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 17.5VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 10.5VulnerableApple
cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:*before 2.44.2VulnerableWebKitGTK
cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:*before 2.44.2VulnerableWpewebkit
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*39VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*40VulnerableFedoraproject
  • cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 17.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 16.7.8; 17.0 to before 17.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 16.7.8; 17.0 to before 17.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 14.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 17.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 10.5 Vulnerable ·Apple
  • cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:* Versions before 2.44.2 Vulnerable ·WebKitGTK
  • cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:* Versions before 2.44.2 Vulnerable ·Wpewebkit
  • cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* Versions 39 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:* Versions 40 Vulnerable ·Fedoraproject

Remediation

Update Safari to 17.5, iOS and iPadOS to 16.7.8 or 17.5, macOS to 14.5, tvOS to 17.5 and watchOS to 10.5. Red Hat fixes it in Red Hat Enterprise Linux AppStream 8 and 9 and in Red Hat Enterprise Linux Server 7 ELS and Server Optional 7 ELS via RHSA-2023:4202, RHSA-2023:4201, RHSA-2024:9636 and RHSA-2025:10364, while Red Hat Enterprise Linux 6 and 7 have no fix planned. CISA requires U.S. federal agencies to fix it by 2026-11-18.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Safari (Apple) Fixed in 17.5
  • Fix · CNA iOS and iPadOS (Apple) Fixed in 16.7.8, 17.5
  • Fix · CNA macOS (Apple) Fixed in 14.5
  • Fix · CNA tvOS (Apple) Fixed in 17.5
  • Fix · CNA watchOS (Apple) Fixed in 10.5

Red Hat 4 advisories

  • RHSA-2025:10364 Released 2025-07-07 · Red Hat rating Important
    webkitgtk4 security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4-2.48.3-2.el7_9, webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-jsc-2.48.3-2.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-doc-2.48.3-2.el7_9, webkitgtk4-jsc-devel-2.48.3-2.el7_9
  • RHSA-2024:9636 Released 2024-11-14 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.46.3-1.el8_10, webkit2gtk3-devel-2.46.3-1.el8_10, webkit2gtk3-jsc-2.46.3-1.el8_10 +1
  • RHSA-2023:4202 Released 2023-07-18 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.38.5-1.el8_8.5, webkit2gtk3-devel-2.38.5-1.el8_8.5, webkit2gtk3-jsc-2.38.5-1.el8_8.5 +1
Show 1 more Red Hat advisories
  • RHSA-2023:4201 Released 2023-07-18 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3-2.38.5-1.el9_2.3, webkit2gtk3-devel-2.38.5-1.el9_2.3, webkit2gtk3-jsc-2.38.5-1.el9_2.3 +1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 14.5

    13 records Highest priority Priority HIGH 3 HIGH, 6 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2024-18456 Apple macOS: An app may be able to execute arbitrary code with kernel privilegesPriority HIGH 76
    • TI-2024-18436 Apple macOS: An app may be able to gain root privilegesPriority HIGH 69
    • TI-2024-18455 Improper access control in Apple iOS and iPadOSPriority MEDIUM 49
    Show all 13 records →
  • Release ·

    Apple watchOS 10.5

    5 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2024-18424 Path traversal in Apple iOS and iPadOSPriority MEDIUM 44
    • TI-2024-18435 Path traversal in Apple iOS and iPadOSPriority MEDIUM 43
    • TI-2024-18418 Resource allocation without limits in Apple iOS and iPadOSPriority MEDIUM 40
    Show all 5 records →
Show 2 more groups
  • Release ·

    Apple iOS and iPadOS 16.7.8, 17.5

    4 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM

    Other records, highest priority first

    • TI-2024-18432 Command injection in Apple iOS and iPadOSPriority MEDIUM 43
    • TI-2024-18411 Apple iOS and iPadOS: An attacker may be able to elevate privilegesPriority MEDIUM 43
    • TI-2024-18460 Apple iOS and iPadOS: An app may be able to bypass Privacy preferencesPriority MEDIUM 40
    Show all 4 records →
  • Release ·

    Apple tvOS 17.5

    4 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2024-18424 Path traversal in Apple iOS and iPadOSPriority MEDIUM 44
    • TI-2024-18418 Resource allocation without limits in Apple iOS and iPadOSPriority MEDIUM 40
    • TI-2024-18430 Apple iOS and iPadOS: An attacker may be able to access user dataPriority LOW 27
    Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:4202, RHSA-2024:9636
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:4201
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:10364
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2025:10364

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-27834
  2. 2026-10-03 Alias added: GHSA-4rmp-jjj9-cfm4
  3. 2026-11-04 Added to CISA KEV
  4. 2026-11-04 CVSS score changed · CISA ADP
  5. 2026-11-04 Weakness changed · CISA ADP
  6. 2026-11-04 Priority changed: MEDIUM → LOW
  7. 2026-11-04 CISA SSVC decision points changed
  8. 2026-11-04 CISA SSVC decision points changed
  9. 2026-11-04 Priority changed: LOW → HIGH
  10. 2026-11-05 EPSS moved to the 50th–90th percentile
  11. 2026-11-05 CISA SSVC decision points changed

References

Advisory 24

  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
See all 2382 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences